Looking for a McIntosh 4100 FM left channel integrated chip - IC702

[Yaakov E]

I have a McIntosh 4100 receiver that works perfectly except for one thing. When in tuner mode, in stereo, the left channel doesn't work. I consulted with a national McIntosh expert and he suggested the IC chip for the left channel was bad. The chip number is IC702 with McIntosh part number 133-037. Does anyone out there have or know where I could acquire this part, to fix the minor FM problem? I'm not a technician, but if I could get the IC, I'd bring it to someone.

 

[BenY]

See if this helps.. Best way in these cases is to buy the part from them.

 

[RJM1]

Check here, post 7

https://audiokarma.org/forums/index.php?threads/mcintosh-aa2-question.776430/

133-037 = LM301AP

 

[RJM1]

Also look here .
https://www.diyaudio.com/community/threads/ancient-opamp-replacement.289512/
Since the LM301AP is discontinued and I would not trust or payfor the NTE975.

 

[stocktrader200]

Short the left and right outputs at the chip with 100 ohm resistor. If you still have no sound the problem is elsewhere. Select switch mute mono stereo switch.

 

[Yaakov E]

Thank you BenY. I'll keep that in mind when I get a repairperson to look at the receiver. In the past I've had every reputable shop in Portland (OR) look at the problem and none of them could solve it. I spoke with Terry DeWick on the phone and he was the one who suggested it might be an IC chip. He didn't know which one. I looked at the parts diagram and guessed at it. I am NOT into audio repair.

To RJM1, I did look at post 7 from your first message and I didn't understand how it applied to my problem. I also looked at your second suggestion and I didn't understand that discussion either.

To stocktrader200, I don't do repair work so shorting outputs is not something I'd even try.

Thank you all for trying to help.